86 lines
1.0 KiB
ArmAsm
86 lines
1.0 KiB
ArmAsm
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; used for title of strongbadzone
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cycle_colors:
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lda FRAME
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lsr
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lsr
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; lsr
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and #$3
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tax
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; lda color_opcodes,X
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; sta color_change1_smc
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; sta color_change2_smc
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lda color_mask_odd,X
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sta color_change1_smc+1
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lda color_mask_even,X
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sta color_change2_smc+1
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ldx #77
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color_loop:
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lda hposn_high,X
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sta OUTH
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eor #$80
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sta INH
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lda hposn_low,X
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sta OUTL
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sta INL
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ldy #39
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color_inner_loop:
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cpx #59
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bcc no_were_good
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cpy #10
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bcc no_were_good
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cpy #24
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bcc skip_area
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no_were_good:
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lda (INL),Y
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color_change1_smc:
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and #$AA
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sta (OUTL),Y
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dey
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lda (INL),Y
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color_change2_smc:
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and #$55
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sta (OUTL),Y
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skip_area:
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dey
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bpl color_inner_loop
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dex
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bne color_loop
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rts
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; green = 1 (10) and $29/$55/$2A
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; purple= 2 (01) and $29/$2A/$55
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; white1= 3 and $29/$7f/$7f
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; orange= 5 (10) and $29/$D5/$AA
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; blue= 6 (01) and $29/$AA/$D5
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; white2= 7 and $29/$FF/$FF
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;color_opcodes:
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; .byte $29,$29,$29,$29 ; and = $29 ora=$09
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color_mask_odd:
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.byte $55,$D5,$FF,$7F
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color_mask_even:
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.byte $2A,$AA,$FF,$7F
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